Permaslip liquid coverslip

Hi histonetters
Has anyone used the above named product as a mounting medium? This was
recommended to us by Hacker Insturments for use in their robot
coverslipper. It appears to work well there where other media didn't. If
anyone has experience with its aging characteristics (does it retract or
fade...) I'd appreciate knowing.
Thanks,
Barbara Albert
UCSF/Stanford Health Care